A year had passed since the destruction of the Chaos Arena. Asagi and Sakura were currently on an abandoned street on a man-made island floating above Tokyo Bay. It was a massive, box-shaped island constructed by the government and known as "Tokyo Kingdom." There had been hope that it would become a second city center floating at sea, but it failed to attract businesses. The only way to reach the island was from Honshu Island via the 10-kilometer Tokyo Kingdom bridge. Unfortunately, this narrow route allowed the inhabitants of hell to find their way onto the island, luring anarchists, criminals, and even illegal immigrants there, transforming the streets of the sea-bound city into a world-renowned haven for danger. However abandoned the streets were, order existed in such a place despite it being a breeding ground for crime. There was a business district at the heart of the island, as well as one of Asia's greatest prostitute grottoes. Whether or not only the strong survived, living there required one not to be careless in making friends with the strong.